name: Linear Integration

on:
  pull_request:
    types: [opened, closed, ready_for_review, reopened, synchronize]
  pull_request_review:
    types: [submitted]
  push:
    branches: [main, "feature/**", "bugfix/**", "task/**"]
  issues:
    types: [opened, closed, reopened]
  issue_comment:
    types: [created]

env:
  NODE_VERSION: "18"

jobs:
  extract-linear-id:
    name: Extract Linear Issue ID
    runs-on: ubuntu-latest
    outputs:
      issue-id: ${{ steps.extract.outputs.issue-id }}
      issue-found: ${{ steps.extract.outputs.issue-found }}

    steps:
      - name: Extract Linear Issue ID
        id: extract
        run: |
          ISSUE_ID=""
          ISSUE_FOUND="false"

          # PR 이벤트에서 Linear 이슈 ID 추출
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            # PR 제목과 본문에서 ZEL-XXX 형태 추출
            TEXT="${{ github.event.pull_request.title }} ${{ github.event.pull_request.body }}"
            ISSUE_ID=$(echo "$TEXT" | grep -oE 'ZEL-[0-9]+' | head -1)
            
            # 브랜치명에서도 추출 시도
            if [[ -z "$ISSUE_ID" ]]; then
              BRANCH="${{ github.event.pull_request.head.ref }}"
              ISSUE_ID=$(echo "$BRANCH" | grep -oE 'ZEL-[0-9]+' | head -1)
            fi
            
          # Push 이벤트에서 커밋 메시지 확인
          elif [[ "${{ github.event_name }}" == "push" ]]; then
            # 최신 커밋 메시지에서 추출
            COMMIT_MSG="${{ github.event.head_commit.message }}"
            ISSUE_ID=$(echo "$COMMIT_MSG" | grep -oE 'ZEL-[0-9]+' | head -1)
            
          # 이슈 이벤트에서 제목/본문 확인
          elif [[ "${{ github.event_name }}" == "issues" ]]; then
            TEXT="${{ github.event.issue.title }} ${{ github.event.issue.body }}"
            ISSUE_ID=$(echo "$TEXT" | grep -oE 'ZEL-[0-9]+' | head -1)
          fi

          if [[ -n "$ISSUE_ID" ]]; then
            ISSUE_FOUND="true"
            echo "Found Linear issue: $ISSUE_ID"
          else
            echo "No Linear issue ID found"
          fi

          echo "issue-id=$ISSUE_ID" >> $GITHUB_OUTPUT
          echo "issue-found=$ISSUE_FOUND" >> $GITHUB_OUTPUT

  sync-pr-events:
    name: Sync Pull Request Events
    runs-on: ubuntu-latest
    needs: extract-linear-id
    if: github.event_name == 'pull_request' && needs.extract-linear-id.outputs.issue-found == 'true'

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}

      - name: Install dependencies
        run: |
          echo "Installing Node.js dependencies for Linear integration..."
          # npm 캐시는 이미 setup-node에서 처리됨

      - name: Sync PR Status
        run: |
          # PR 머지 여부 확인
          PR_MERGED="false"
          if [[ "${{ github.event.action }}" == "closed" && "${{ github.event.pull_request.merged }}" == "true" ]]; then
            PR_MERGED="true"
          fi

          echo "Syncing PR event:"
          echo "  Issue ID: ${{ needs.extract-linear-id.outputs.issue-id }}"
          echo "  Event: ${{ github.event_name }}"
          echo "  Action: ${{ github.event.action }}"
          echo "  PR URL: ${{ github.event.pull_request.html_url }}"
          echo "  Author: ${{ github.event.pull_request.user.login }}"
          echo "  Merged: $PR_MERGED"

          # Linear 동기화 실행
          node scripts/linear-sync.cjs \
            --issue-id="${{ needs.extract-linear-id.outputs.issue-id }}" \
            --event="${{ github.event_name }}" \
            --action="${{ github.event.action }}" \
            --pr-url="${{ github.event.pull_request.html_url }}" \
            --pr-author="${{ github.event.pull_request.user.login }}" \
            --pr-merged="$PR_MERGED"
        env:
          LINEAR_API_KEY: ${{ secrets.LINEAR_API_KEY }}

      - name: Add PR Comment
        run: |
          echo "Adding comment to Linear issue:"
          echo "  Issue ID: ${{ needs.extract-linear-id.outputs.issue-id }}"
          echo "  Event: ${{ github.event_name }}"
          echo "  Action: ${{ github.event.action }}"

          # Linear 코멘트 추가
          node scripts/linear-comment.cjs \
            --issue-id="${{ needs.extract-linear-id.outputs.issue-id }}" \
            --event="${{ github.event_name }}" \
            --action="${{ github.event.action }}" \
            --pr-url="${{ github.event.pull_request.html_url }}" \
            --pr-author="${{ github.event.pull_request.user.login }}"
        env:
          LINEAR_API_KEY: ${{ secrets.LINEAR_API_KEY }}

  sync-review-events:
    name: Sync Review Events
    runs-on: ubuntu-latest
    needs: extract-linear-id
    if: github.event_name == 'pull_request_review' && needs.extract-linear-id.outputs.issue-found == 'true'

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}

      - name: Sync Review Status
        run: |
          echo "Syncing review event:"
          echo "  Issue ID: ${{ needs.extract-linear-id.outputs.issue-id }}"
          echo "  Review State: ${{ github.event.review.state }}"
          echo "  Reviewer: ${{ github.event.review.user.login }}"
          echo "  PR URL: ${{ github.event.pull_request.html_url }}"

          # Linear 코멘트 추가
          node scripts/linear-comment.cjs \
            --issue-id="${{ needs.extract-linear-id.outputs.issue-id }}" \
            --event="pull_request_review" \
            --review-state="${{ github.event.review.state }}" \
            --reviewer="${{ github.event.review.user.login }}" \
            --pr-url="${{ github.event.pull_request.html_url }}"
        env:
          LINEAR_API_KEY: ${{ secrets.LINEAR_API_KEY }}

  sync-push-events:
    name: Sync Push Events
    runs-on: ubuntu-latest
    needs: extract-linear-id
    if: github.event_name == 'push' && needs.extract-linear-id.outputs.issue-found == 'true'

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}

      - name: Sync Commit Status
        run: |
          echo "Syncing push event:"
          echo "  Issue ID: ${{ needs.extract-linear-id.outputs.issue-id }}"
          echo "  Commit SHA: ${{ github.event.head_commit.id }}"
          echo "  Commit Message: ${{ github.event.head_commit.message }}"
          echo "  Author: ${{ github.event.head_commit.author.username }}"

          # Linear 동기화 및 코멘트 추가
          node scripts/linear-sync.cjs \
            --issue-id="${{ needs.extract-linear-id.outputs.issue-id }}" \
            --event="push" \
            --action="commit"

          node scripts/linear-comment.cjs \
            --issue-id="${{ needs.extract-linear-id.outputs.issue-id }}" \
            --event="push" \
            --commit-sha="${{ github.event.head_commit.id }}" \
            --commit-message="${{ github.event.head_commit.message }}" \
            --pr-author="${{ github.event.head_commit.author.username }}"
        env:
          LINEAR_API_KEY: ${{ secrets.LINEAR_API_KEY }}

  sync-issue-events:
    name: Sync Issue Events
    runs-on: ubuntu-latest
    needs: extract-linear-id
    if: github.event_name == 'issues' && needs.extract-linear-id.outputs.issue-found == 'true'

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}

      - name: Sync Issue Status
        run: |
          echo "Syncing issue event:"
          echo "  Issue ID: ${{ needs.extract-linear-id.outputs.issue-id }}"
          echo "  Action: ${{ github.event.action }}"
          echo "  GitHub Issue: ${{ github.event.issue.html_url }}"

          # Linear 코멘트 추가
          node scripts/linear-comment.cjs \
            --issue-id="${{ needs.extract-linear-id.outputs.issue-id }}" \
            --event="issue" \
            --action="${{ github.event.action }}" \
            --github-issue-url="${{ github.event.issue.html_url }}"
        env:
          LINEAR_API_KEY: ${{ secrets.LINEAR_API_KEY }}

  notify-no-linear-id:
    name: Notify No Linear ID Found
    runs-on: ubuntu-latest
    needs: extract-linear-id
    if: needs.extract-linear-id.outputs.issue-found == 'false'

    steps:
      - name: Log Missing Linear ID
        run: |
          echo "⚠️ No Linear issue ID found in:"
          echo "  Event: ${{ github.event_name }}"

          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            echo "  PR Title: ${{ github.event.pull_request.title }}"
            echo "  Branch: ${{ github.event.pull_request.head.ref }}"
          elif [[ "${{ github.event_name }}" == "push" ]]; then
            echo "  Commit: ${{ github.event.head_commit.message }}"
          fi

          echo ""
          echo "Linear 이슈와 연결하려면 다음 형식을 사용하세요:"
          echo "  - PR 제목: '[ZEL-123] 기능 구현'"
          echo "  - 브랜치명: 'feature/ZEL-123-user-auth'"
          echo "  - 커밋 메시지: 'feat: 로그인 기능 구현 [ZEL-123]'"

  summary:
    name: Linear Integration Summary
    runs-on: ubuntu-latest
    needs:
      [
        extract-linear-id,
        sync-pr-events,
        sync-review-events,
        sync-push-events,
        sync-issue-events,
      ]
    if: always()

    steps:
      - name: Summary
        run: |
          echo "🔗 Linear Integration Summary"
          echo "=============================="
          echo "Event: ${{ github.event_name }}"
          echo "Linear Issue Found: ${{ needs.extract-linear-id.outputs.issue-found }}"

          if [[ "${{ needs.extract-linear-id.outputs.issue-found }}" == "true" ]]; then
            echo "Issue ID: ${{ needs.extract-linear-id.outputs.issue-id }}"
            echo "✅ Linear integration completed"
          else
            echo "❌ No Linear issue ID found"
          fi

          echo ""
          echo "Job Results:"
          echo "  Extract ID: ${{ needs.extract-linear-id.result }}"
          echo "  PR Sync: ${{ needs.sync-pr-events.result }}"
          echo "  Review Sync: ${{ needs.sync-review-events.result }}"
          echo "  Push Sync: ${{ needs.sync-push-events.result }}"
          echo "  Issue Sync: ${{ needs.sync-issue-events.result }}"